Although renal disorders are relatively uncommon in adolescents, signs
or symptoms of renal disease in an adolescent inevitably causes great
concern. Adolescents are susceptible to many of the same urinary trac
t disorders that can present early in childhood. Evidence of renal dis
ease in an adolescent deserves prompt attention and appropriate evalua
tion. The key issue in the evaluation of hematuria or proteinuria in a
n adolescent is the existence of concomitant signs of renal disease. F
or hematuria and proteinuria, discussion of a proper evaluation is pre
sented. Even though most teens With persistent elevated blood pressure
s have essential hypertension, this must be considered a serious conce
rn with potential life-long consequences. A discussion of the definiti
on of hypertension and proper evaluation and treatment in adolescents
is presented.